Tissue anchor



FIG. 1 is an isometric view of a design for a tissue anchor.

FIG. 2 is a front side view of the design for the tissue anchor.

FIG. 3 is a back side view of the design for the tissue anchor.

FIG. 4 is a right side view of the design for the tissue anchor.

FIG. 5 is a left side view of the design for the tissue anchor.

FIG. 6 is a top side view of the design for the tissue anchor; and,

FIG. 7 is a bottom side view of the design for the tissue anchor.

The broken lines shown in the drawings are included for the purpose of illustrating environmental structure of the tissue anchor and form no part of the claimed design. 

CLAIM The ornamental design for a tissue anchor, as shown and described. 